My forms are not working properly

Hello I hope everything is fine.
My name is Paulo Vieira and I am doing my company’s newest website: Castro Interiors
I am struggling with some problems regarding forms because they are not working. I have seen tuns of tutorials and templates, and I cannot figure out how to solve them.

Here is my site Read-Only: Webflow - CastroInteriors
(how to share your site Read-Only link)